Drill-stock



B. F. SMITH.

DRILL STOCK.

(No Model.)

Patented Jan.6, 1891.

UNITED STATES PATENT FFICE.

BENJAMIN F. SMITH, OF SOMERVILLE, MASSACHUSETTS.

DRILL-STOCK.

SPECIFICATION forming part of Letters Patent No. 444,256, dated January 6, 1891.

I Application filed September 22, 1890. Serial No. 365.713. (No model.)

To all whom it may concern: equally applicable to whatis termed ratchet Be it known that I, BENJAMIN F. SMITH, a drill-stocks; and I wish to state that the parcitizen of the United States, and a resident ticular drill-stock as shown forms no part of of Somerville, in the county of Middlesex and my present invention, as it may be Varied,

State of Massachusetts, have invented new and any of the well-known drill-stocks may and useful Improvements in Drill-Stocks, of be used without departing from the essence which the following, taken in connection with of my invention. the accompanying drawings, is a specifica- The sleeve 1) has in each of its ends tapertion. ing recesses 17 and If, either of which is m This invention relates to improvements in adapted to receive the shank of the drill d or drill-stocks; anditconsistsin the combination, other toolsuch as, for instance, bits, screwwith a drill-stock, of a detachable and reversdrivers, nuts, and the likeor the shank of ible feed-screw device by which the usefulthe screw-feeding device. The improved ness of the tool is materially increased, as feeding device consists of a sleeve 6, within will hereinafter be more fully shown and dewhich is secured in a suitable manner the scribed, reference being had to the accompafeed-screwf, the upper end of which projects nying drawings, whereinthrough the upper end of the said sleeve and Figure 1 represents a plan view of the interminates as a center point f, as shown in vention. Fig. 2 represents a central longi- Fig. 2. Vithin the sleeve c is fitted loosely 2o tudinal section on the line X X shown in Fig. the socket g, which is centrally screw-threaded 7o 1, and Fig. 3 represents a cross-section on the to receive the feed-screw f, said socket having line Y Y shown in Fig. 2. at its lower end a shank g adapted to fit into Similar letters refer to similar parts whereither of the tapering recesses b or b of the ever they occur on the different parts of the drill-stock sleeve Z), as shown in Fig. 2 5 drawings. The sleeve e has preferably at its upper end 7 5 a is the hub of the drill-stock, having a a polygonal head 6', which may be grasped, handle a, as usual. The stock a has a centurned,or held by the aid of a suitable wrench tral vertical perforation, in which is loosely or other device during the operation of the journaledthe sleeve 1), having in one end a tool. o shoulderb, and having attached to its oppo- Heretofore in drill-stocks the socket of the site end a collar b, as fully shown in Fig. 2. feed-screw device has been permanently at- In the drawings I have shown the stock a tached to the drill-stock sleeve, by which the as having tapering recesses a a a, in which utility of the drill-stock is very much limited, are loosely arranged the friction-rollers c c c, as it could only be used for the purpose of 35 in a manner and for the purpose as fully imparting motion in one direction to its drill, shown and described in the patent granted to tap, or other tool; but by making the feedme October 23, 1888,No.391,655, for improvescrew device as a detachable structure from ments in tap and drill stocks, by which arthe drill-stock the position of said feed-screw rangeinent the sleeve 1) is caused to follow the device may be reversed so as to impart mo- 40 motion of the handle a when the latter is tion in any one of two opposite directions to swung in the direction shown by arrow in the drill-stock sleeve and the tool inserted Fig. 3. Then the said handle is swung in an therein, and by such arrangement the useopposite direction, no motion is imparted to fulness of the drill-stock is materially insaid sleeve b. This is what is termed a friccreased. tion drill-stock, and this is the kind I have Having thus fully described the nature, represented in the drawings; but I wish to construction, and operation of my invention, state that, although I have shown such a fric- I wish to secure by Letters Patent, and claim-- tion drill-stock in the drawings, I do not wish In combination with a drill-stock, a detachto limit myimproved feed device to the comable feed-screw device consisting of a sleeve 50 bination with such precise drill-stock, as itis c and a longitudinal screw f secured within it, and an internniiy-serew-threzn'led socket y, I nmne to this specification, in the presence of adapted to receive the said screw and fitting twe subscribing witnesses, on this 16th day within said sleeve, and having a shank y j of September, A. D. 1890.

adapted to be inserted in either end of the BENJAMIN 1". SMITH. seeketed drill-stock sleeve, snhstmitiaiiy as I Witnesses:

and for the purpose set forth. ALBAN ANDREN,

i V In testimony whereof I have signed my 1 ALICE A. IERKINs'. 

